<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>2.姓名案例_methods实现</title>
    <!-- 引入Vue -->
    <script type="text/javascript" src="../js/vue.js"></script>
</head>

<body>
    <!-- 准备好一个容器-->
    <div id="demo">
        姓：<input type="text" v-model="firstName"> <br /><br />
        名：<input type="text" v-model="lastName"> <br /><br />
        全名：<span>{{getTheFullname()}}</span>
    </div>
</body>

<script type="text/javascript">
    //阻止 vue 在启动时生成生产提示。
    Vue.config.productionTip = false

    new Vue({
        el: '#demo',
        data: {
            firstName: 'zhang',
            lastName: 'san',
            schollName: '尚硅谷'
        },
        methods: {
            getTheFullname() {
                console.log('getTheFullname')
                //解构赋值，从vm上获取firstName、lastName
                const {
                    firstName,
                    lastName
                } = this //此处的this是vm
                return firstName[0].toUpperCase() + firstName.slice(1) + '-' + lastName
            }
        }
    })
</script>

</html>